Attachment for ang le-cocks



(No Model.)

E. B. STONER.

ATTACHMENT FOR ANGLE COCKS. No. 552,793 Patented Jan. "7, 1896.

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A M WITNESSES: E; INVENTOI? 'ELRJZahei? A TTOHNEYS.

AN DREW B GRAHAM. FHQTOUTKQWASHIN-GTON.RC.

UNITED STATES- PATENT OFFICE.

EARL B. STONER, OF SEASIDE, OREGON.

ATTACHMENT FOR ANG LE-COCKS.

SPECIFICATION forming part of Letters Patent No. 552,793, dated January 7, 1896.

Application filed August 31, 1894. $e1'ial No. 521,831. (No model.)

To all whom it may concern.-

Be it known that I, EARL B. STONER, of Seaside, in the county of Clatsop and State of Oregon, have invented a new and Improved Air-Brake Attachment, of which the following is a specification.

The object of my invention is to provide an attachment in the nature of an automatic check-valve for the train-pipe of a \Vestinghouse air-brake system, whereby the passage of air is permitted around the angle or stop cock of said pipe when the same is closed, so that the engineer is able to retain control of the brake system, even if the an gle-cock be carelessly or maliciously manipulated. In other words, the attachment prevents air being shut oii from a carby means of the anglecock, so long as the hose is duly connected or coupled.

In the accompanying drawings, Figure l is a plan view showing the arrangement of my attachment with a train-pipe and its anglecock, the attachment being supposed to be connected with a train-pipe at that end of a car which is nearest the locomotive. Fig. 2 is an enlarged longitudinal central section of the attachment proper.

a indicates the ordinary train-pipe, b the flexible hose usually employed to couple the train-pipes of adjacent cars, and c the angle or stop cock of said pipe. My improved attachment A is arranged alongside such angle cock 0 and connected with the train-pipe a on opposite sides of the cockby means of two short pipes 2 and 11.

My said attachment is composed mainly of a box or casing and an automatic valve-like device inclosed by it. The box or casing has removable screw-heads 3 and a transverse integral partition 1, which divides it interiorly into two chambers or compartments 9 and 9. The said partition 1 is provided with a central opening in which the automatic device is held slidably. Said device is composed of a tubular body 4, having air-ports partition 1, and the piston or head 7 is formed the sides of chamber 9.

integrally with it and fits air-tight against The radially-thickened edge of the screw-cap 5 is beveled on the inner side to adapt it to fit the corresponding seat 6 formed on the partition 1 around the opening therein.

v b It will be noted that the parts or heads 5 and 7 differ in area or surface exposed to airpressure. A helical spring 12 is arranged in a socket behind the piston to assist in movin the latter quickly when the air-pressure in the train-pipe a is lessened. 10 indicates a vent for air that may pass the piston 7... I

The length of the body at of the automatic valve exceeds the thickness of the partition 1 to suchextent that when the piston or head 7 is close'to the partition 1, as shown by full lines, the portion of the body 4, in which the air-ports 8 are formed, projects into the compartment 9. This is the normal position of the device when a train is made up and the train-pipes of the various cars are duly connected with the locomotive, it being understood that the branch pipe 11 is nearer the locomotive than pipe 2, and that the portion of the train-pipe a shown is at the forward end of a car. It will be seen, however, that if the angle-cock c be closed the air-pressure on the piston 7 will force and hold it against the spring, so that air will pass from com partment 9 through ports 8 into the compartment 9. Thus an air-passage is established around the angle-cock c from one portion of the train-pipe to another, and the same is maintained so long as the pressure is normal. Hence the closing of the angle-cock c by accident, carelessness, or malice has no effect on the brake system, since the engineer retains control of the same throughout the train. In fact, so far as this is practically concerned, it is immaterial whether the anglecock be closed or open. If, however, it is desired to uncouple two cars, the angle-cock 0 being closed, a slight relief of air-pressure consequent upon disconnecting the hose instantly effects the closing of the automatic valve, as shown by dotted lines, Fi 2. Upon rccoupling, the device resumes the position shown by full lines. Thus it is practically impossible to cut off any portion of the airbrake system of a train from the locomotive and thereby remove it from control of the engineer by manipulation of the angle-cock 0, so long as the normal air-pressure in the train-pipe is maintained.

lVhat Iclaim is- 1. In an air-brake system, as specified, the combination,with the train-pipe and an an glecock therein, and two connecting pipes arranged on opposite sides of such cock, of an automatic attachment composed of a casing having two compartments with which said pipes are connected, an apertured partition, separating said compartment, and an automatic device inthe nature of a valve, which opens and is held open by airpressure in the train pipe, and closes automatically when such pressure is relieved, substantially as shown and described.

2. The automatic attachment for a trainpipe and its angle-cock, which is composed of a box, or casing, having two compartments and a separating partition, a device in the nature of a valve which is slidable in said partition, and has differential heads, whereby it opens by air pressure on the larger head and closes when air pressure is relieved, substantially as shown and described.

3. The automatic attachment for a trainpipe and angle-cock, which consists of a casing having an apertured partition and two compartments provided with openings, a valve-like device which slides in said partition and consists of a tubular body having air ports near its closed end and provided with an enlarged head that seats on the partition, its open end being provided with an enlarged piston or head working in one of said compartments, as shown and described.

4. The automatic attachment for a trainpipe, the same being composed of a partitioned casin g, or box, having its ends threaded interiorly, removable threaded heads screwing into the same, avalve-like device having a tubular body that slides in the aperture in said partition, and has an enlarged integral piston head at one end, and a removable en larged screw-cap and head on the other end, as shown and described.

EARL B. ONER. Vitnesses:

FR. PRAEL, THERESA PRAEL. 

